Create a Clone of LocalBitcoins.com

I would like to build a bitcoin exchange exactly like [login to view URL], which is a peer-to-peer buy and sell marketplace, with wallet option, in-trade chat, reserve of bitcoins while both parties confirm payment and release, dispute option, integrated with an automatic bitcoin price, people could choose their margin over/under the price to buy/sell, and we want to be able to choose our own fee per transaction, and be able to customize the web. I am also concerned about security; the platform should be protected against hackers and possible threats, to give confidence to the costumers.